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Is the nozzle type flowmeter the same as the cone type differential pressure flowmeter?
They are different. A nozzle flowmeter is a differential pressure generating device for measuring flow rate, which can be used in conjunction with various differential pressure gauges or transmitters to measure the flow rate of various fluids in pipelines. The standard nozzle throttling device is used in conjunction with differential pressure transmitters to measure the flow rates of liquids, vapors, and gases, and is widely used in sectors such as petroleum, chemical, metallurgical, power, and light industry. Cone flowmeter is a new type of differential pressure flow measurement device, which uses a unique edge wall gradually contracting throttling method to change almost all the disadvantages of conventional throttling devices. It is a revolutionary achievement of differential pressure flowmeter. Its principle is the same as other differential pressure flow meters, which is the classic principle of energy conservation and flow continuity in closed pipelines, and has self rectification, self-cleaning, and self-protection functions.
2. Doppler flowmeter
3. What are the types of flow meters for distillation tower pipelines
The main types of flow meters for distillation tower pipelines are differential pressure, volumetric, float, electromagnetic, vortex, ultrasonic, and Coriolis mass.
Differential pressure flow meters use the pressure difference generated when fluid flows through throttling elements to measure flow rate, which is common in the inlet and outlet pipelines of distillation towers. Orifice flowmeter: simple structure, low cost, high temperature and high pressure resistance, but with lar
2. Positive displacement flowmeter measures flow rate by measuring the number of times the fluid is sequentially filled and discharged in the measuring chamber, suitable for high viscosity media. Elliptical gear flowmeter: with extremely high accuracy (up to 0.2 level), suitable for measuring oil products, solvents, etc., but with large pressure loss and high requirements for cleanliness. Double rotor flowmeter: with small pressure loss, suitable for measuring large flow rates, commonly used in media such as heavy oil and asphalt. Float flowmeter (rotor flowmeter) uses the height variation of the float in a conical tube to measure flow rates, suitable for low flow and low-pressure conditions. Metal tube float flowmeter: corrosion-resistant, capable of remote signal output, suitable for scenarios such as chemical reagent addition. Glass tube float flowmeter: Low cost, intuitive and easy to read, but fragile and limited to low-pressure and room temperature media
4. Electromagnetic flowmeter is based on Faradays law of electromagnetic induction to measure the volume flow rate of conductive liquids, with no pressure loss and high accuracy (0.3-0.5 level). Must be used for media with conductivity greater than 5 μ S/cm (such as water, acid, alkaline solution), cannot measure oil or gas
5. Vortex flowmeter calculates the flow chamber wear by detecting the frequency of vortex shedding in the fluid, suitable for gases, vapors, and liquids. High temperature and high pressure resistance (